Cluster size effect observed for gold nanoparticles synthesized by sol-gel technique as studied by X-ray photoelectron spectroscopy

    Authors

    S. Shukla;S. Seal

    Comments

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    Abbreviated Journal Title

    Nanostruct. Mater.

    Keywords

    BINDING-ENERGY SHIFTS; METAL-CLUSTERS; ELECTRONIC-STRUCTURE; AMORPHOUS-CARBON; PHOTOEMISSION; PALLADIUM; SILVER; SUBSTRATE; PARTICLES; COPPER; Materials Science, Multidisciplinary

    Abstract

    Gold nanoparticles have been synthesized by sol-gel technique. AFM analysis shows the presence of less than or equal to 12-14 nm and 40-60 nm sized particles for H2S/not heated and H2S/heated samples respectively. XPS analysis of H2S/not heated sample reveals that the core-level Au 4f7/2 B.E. is shifted by +0.3 eV with increase in the FWHM by 0.2 eV relative to the respective bull; values of 84.0 eV and 1.1 eV. The results are interpreted in terms of the changes in the electronic structure due to finite cluster size and creation of +ve charge over the surface of cluster during the photoemission process itself. The electronic structure of Au nanoparticles (or clusters) produced by present sol-gel technique is compared with that of Au clusters deposited by evaporation method described in the literature. (C) 2000 Acta Metallurgica Inc.

    Journal Title

    Nanostructured Materials

    Volume

    11

    Issue/Number

    8

    Publication Date

    1-1-1999

    Document Type

    Article

    Language

    English

    First Page

    1181

    Last Page

    1193

    WOS Identifier

    WOS:000087144600024

    ISSN

    0965-9773

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